header {
  width: 100%;
  height: 50px;
  background-color: orange;
  position: relative;
}
header .content {
  width: 100%;
  line-height: 45px;
  display: flex;
  justify-content: space-between;
}
header .site {
  font-size: 0.27rem;
}
header span {
  font-size: 0.27rem;
}
header .user img {
  width: 0.34rem;
  height: 0.34rem;
  position: absolute;
  right: 30px;
  top: 4px;
}
.mall_nav {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  margin: 10px 20px;
}
.mall_nav .nav_list {
  border: 1px solid #888;
  padding: 5px;
  margin: 8px;
}
.mall_nav .nav_list a img {
  width: 15px;
  height: 15px;
  display: inline;
}
